New Sol'Ex book

I finally bought the book "Guide de l'observation solaire avec un spectrohéliographe" by Christian Buil and Valerie Desnoux, subtitled "Explorer le Soleil invisible avec Sol'Ex".

There’s just one major catch... it’s written entirely in French, and there’s no sign of an English translation anywhere on the horizon. Since my French is pretty rusty, this is going to be a real challenge—but exploring the 'invisible Sun' with the Sol'Ex will be well worth the effort!

Moon and Venus with my Weatherstation

A beautiful alignment of the Moon, Venus and my weatherstation.

Heat waves 2025 and 2026 (so far)

A heat wave is an extended period of anomalously high atmospheric temperatures driven by synoptic-scale anticyclones, where sinking air warms adiabatically and suppresses cloud formation. This allows uninterrupted solar radiation to directly heat the Earth's surface, creating a thermal feedback loop amplified by dry, low-specific-heat sandy soils like those in Averbode. In Belgium, the official threshold requires at least five consecutive days reaching 25 Celsius or higher, with at least three of those days exceeding 30 degrees Celsius. The localized environmental and thermodynamic impacts of these specific atmospheric events in Averbode are outlined below with a comparison of the official data of KMI Uccle.

For Averbode we have more heat waves then official registrated by KMI in Uccle. Also the lenght of the heat waves are longer. 

Data is measured using weather station:  Levenhuk - WU ISCHER75 or EcoWitt EasyWeatherPro-16ACFC

Sun July 15 different wavelengts

The Sun in different wavelengths.

Setting: Sol'Ex by James R on TLAPO80/480 and ASI678MM

Herschel Wegde, 2nd Gen Slit and IR Cut Filter

Tilt <0,5° and Sx/Sy=1

Software: SharpCap, Inti, JSolex, DeNoise AI, CS4

Sun July 14

Very good seeing this morning. Mount was polar aligned and Sol'Ex was foreseen with an IR Cut filter.

Setting: Sol'Ex by James R, Herschel Wedge and IR Cut filter

TLAPO80/480 with ASI678MM Camera

Sx/Sy = 1 and tilt 0,2°

Software: SharpCap, Inti, JSolex, CS4, AstroSurface and DeNoise AI

 

MgIb2 (-1 pixel or 0,06A)

July 11 Prominences

Images of the Sun and it's prominences. Images are inversed.

Prominence July 12

Prominence on July 12, 2026.